CVE-2026-55849

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 85% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

@cyclonedx/cyclonedx-npm creates CycloneDX Software Bill of Materials from npm projects. From 2.1.0 before 5.0.0, the CLI passes user-supplied --workspace values to a subshell without proper sanitization when npm_execpath is unset or empty, allowing arbitrary OS command execution with the privileges of the invoking user. This issue is fixed in version 5.0.0.

CVSS v3
8.5
EG Score
8.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity85% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

Published

June 19, 2026

Last Modified

July 10, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
githubMentions a patch (unverified)

Shell Injection via Unsanitized --workspace Argument in @cyclonedx/cyclonedx-npm · Advisory · CycloneDX/cyclonedx-node-npm · GitHub

https://github.com/CycloneDX/cyclonedx-node-npm/security/advisories/GHSA-v75r-vx73-82pj
github_release Patch Available

5.0.0

Patch available: CycloneDX/cyclonedx-node-npm v5.0.0

https://github.com/CycloneDX/cyclonedx-node-npm/releases/tag/v5.0.0
github_pr Patch Available

fix: eliminate possible shell-injection in `--workspace` argument

Patch available: CycloneDX/cyclonedx-node-npm v5.0.0 (PR #1476 merged 2026-06-16)

https://github.com/CycloneDX/cyclonedx-node-npm/pull/1476
github_commit Patch Available

commit 9f646253f426 (CycloneDX/cyclonedx-node-npm)

Patch available: CycloneDX/cyclonedx-node-npm v5.0.0 (contains commit 9f646253f426)

https://github.com/CycloneDX/cyclonedx-node-npm/commit/9f646253f4263d8644dadb86e5597fad996f688f

Vendor Advisories for CVE-2026-55849(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@cyclonedx/cyclonedx-npm—
  • 2.1.0 up to 5.0.0: fixed in 5.0.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 122 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
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  1. 2026-09-13 16:47 UTCEPSS rescore
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  75. 2026-07-23 03:20 UTCEG score recompute

Related CVEs(same product + same CWE)

Same product

1 shown

npm:@cyclonedx/cyclonedx-npm

Frequently asked(5)

What is CVE-2026-55849?
CVE-2026-55849 is a high vulnerability published on June 19, 2026. @cyclonedx/cyclonedx-npm creates CycloneDX Software Bill of Materials from npm projects. From 2.1.0 before 5.0.0, the CLI passes user-supplied --workspace values to a subshell without proper sanitization when npm_execpath is unset or empty, allowing arbitrary OS command execution with the…
When was CVE-2026-55849 disclosed?
CVE-2026-55849 was first published on June 19, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55849 actively exploited?
CVE-2026-55849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55849?
CVE-2026-55849 has a CVSS base score of 8.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55849?
A fix for CVE-2026-55849 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55849 are linked in the Vendor Advisories panel on this page.

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